Place pork roast in 3 1/2 to 4-quart slow cooker.
In small bowl, combine cranberries, broth, orange peel and 1/4 cup of the cranberry juice cocktail; mix well. Pour over roast.
Cover; cook on low setting for 7 to 9 hours.
To serve, place roast on serving platter; cover with foil to keep warm. Pour juices from slow cooker into medium saucepan; if necessary, skim off any fat.
In small bowl, combine remaining 1/4 cup cranberry juice cocktail and cornstarch; blend well. Stir into juices in saucepan. Cook and stir over medium heat until bubbly and thickened. Serve with pork roast. Garnish with shredded orange peel if desired.